On Tue, Oct 20, 2009 at 08:57:13PM +0200, Paolo Bonzini wrote: > On 10/20/2009 08:39 PM, Mark McLoughlin wrote: >> On Thu, 2009-10-08 at 22:37 +0200, Michael S. Tsirkin wrote: >>> With commit ee3993069ff55fa6f1c64daf1e09963e340db8e4, >>> "posix-aio-compat: avoid signal race when spawning a thread" >>> winxp installation on a raw format file fails >>> during disk format, with a message "your >>> disk may be damaged". >>> >>> This commit moved signal mask from aio thread to creating thread. >>> It turns out if we keep the mask in aio thread as well, the problem >>> disappears. It should not be needed, but since this is harmless, let's >>> keep it around until someone inclined to debug pthread library internals >>> can check this issue. >>> >>> While we are at it, convert sigprocmask to pthread_sigmask >>> as per posix. >> >> FWIW, I just started hitting a boot hang with qemu.git and --enable-kvm >> on a Fedora 11 machine with a Fedora 11 guest. >> >> I bisected it back to malc's commit, found this thread, applied >> Michael's patch and confirmed that it fixes the problem for me too. > > If anybody can send me the output of compiling the "strange" file with > and without the patch, both with "-fdump-tree-all -fdump-rtl-all -O2 > --save-temps -g" flags, I could try debugging it in GCC. > > It will be huge, so bz/gz/lzip it.
I've uploaded them here: http://www.kernel.org/pub/linux/kernel/people/mst/ you can't see them in mirrors yet but will be able to soon when kernel.org mirroring system catches them. > Paolo
